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The Sommerodde (Telychian, Silurian) positive carbon isotope excursion: why is its magnitude so variable?

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    0577933 - GLÚ 2024 RIV GB eng J - Journal Article
    Loydell, D. K. - Gutiérrez-Marco, J. C. - Štorch, Petr
    The Sommerodde (Telychian, Silurian) positive carbon isotope excursion: why is its magnitude so variable?
    Journal of the Geological Society. Roč. 180, č. 5 (2023), č. článku jgs2023-037. ISSN 0016-7649. E-ISSN 2041-479X
    Institutional support: RVO:67985831
    Keywords : carbon isotope record * graptolite biostratigraphy * SOCIE * lower Silurian
    OECD category: Geology
    Impact factor: 2.7, year: 2022
    Method of publishing: Open access
    https://www.lyellcollection.org/doi/epub/10.1144/jgs2023-037

    The Sommerodde positive organic carbon isotope excursion (SOCIE) within the Oktavites spiralis graptolite Biozone (Telychian, Silurian) was first identified in the Sommerodde-1 core, Bornholm, Denmark, where it is the largest positive excursion within the Upper Ordovician–lower Silurian part of the core. Other published occurrences of the SOCIE are discussed here, including new δ13Corg data from the Jabalón River section, Corral de Calatrava, central Spain, where the SOCIE is only a very minor positive excursion. Very unusually, the SOCIE is best developed in deeper water settings, contrary to the typical pattern of declining excursionmagnitude offshore. In the Sommerodde-1 core (Bornholm), and where it has been tentatively identified in the Vežaičiai-2 core (Lithuania), the SOCIE is developed in pale, organic-poormudstones. It is considered likely that themagnitude of the SOCIE has been enhanced in the Sommerodde-1 core record by a change in organic matter composition in the deep-marine environment that did not have such a significant effect in shallower marine environments.
    Permanent Link: https://hdl.handle.net/11104/0347629

     
     
Number of the records: 1  

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